bugfix/install-ubuntu

[lgoldstien]

Allows installation on non-pi desktop ubuntu (to allow development of applications outside of pi land)

This merge will address parts of nebrius/raspi-io#24 nebrius/raspi-io#41

Tested npm install on:

Raspbian (2015-11-21-raspbian-jessie)
0.10.29 - system
iojs-3.3.1
4.1.1
5.1.0
5.3.0

Ubuntu 15.10
0.10.25 - system
iojs-3.3.1
0.12.7
4.1.1
5.1.0
5.3.0

[nebrius]

Thanks for the PR @lgoldstien! Overall this looks good, I just have one request. Instead of creating the config.txt file using touch, can you add some logic at https://github.com/nebrius/raspi-i2c/blob/master/script/enable_i2c.js#L30 instead? I think it would be cleaner and more maintainable to keep the logic for updating config.txt in one file.

You could do something like

var config;
try {
  config = fs.readFileSync('/boot/config.txt').toString();
} catch {
  config = '';
}
config = iniBuilder.parse(config, { commentDelimiter: '#' });

(note: that code wasn't tested 😅)

[lgoldstien]

Thanks for the reply @nebrius good request, will implement that when I am able.

[lgoldstien]

I've followed your request, and also added a warning to state that /boot/config.txt will be created if it does not exist. Retested installation on all the above platforms and works.

[nebrius]

Nice call on adding the warning, this looks great! Thanks again for the PR

[nebrius]

I just published v2.2.0 with this change!